server WIP

.gitignore

@@ -0,0 +1,3 @@
+__pycache__
+db.sqlite3
+venv

eightserve.cfg

@@ -0,0 +1,6 @@
+
+DISPLAY_COLUMNS = 32
+DATABASE_URL = "sqlite:///db.sqlite3"
+SUSLIST_TIMEOUT = "01:00"
+SUSLIST_THRESHOLD = 5
+MESSAGE_MAX_LINES = 10

eightserve.py

@@ -1,15 +1,26 @@
 #!/usr/bin/env python
 
-from quart import Quart, url_for, redirect, session, make_response, render_template, request, send_file, abort, flash
+import re
+import secrets
+from pathlib import Path
+import os
+import hashlib
+from uuid import uuid4
+
+from quart import Quart, url_for, redirect, session, make_response, render_template, request, send_file, abort, flash, g
+from quart_db import QuartDB
+import datetime
 
 app = Quart(__name__)
-app.config.from_envvar('APP_CONFIG')
+app.config.from_envvar('APP_CONFIG', silent=True)
 if app.config['SECRET_KEY'] is None:
-    if (p := Path('/run/secrets/eightserve')).is_file():
+    if (p := Path('/tmp/eightserve-secret')).is_file():
         app.config['SECRET_KEY'] = p.read_bytes()
+
     else:
         app.config['SECRET_KEY'] = os.urandom(32)
         try:
+            p.touch(0o600)
             p.write_bytes(app.config['SECRET_KEY'])
         except:
             pass
@@ -18,7 +29,12 @@ app.config.update(
     SESSION_COOKIE_SECURE=True,
     SESSION_COOKIE_HTTPONLY=True,
     SESSION_COOKIE_SAMESITE='Lax',
+#    SERVER_NAME='8seg.jaseg.de',
 )
+DISPLAY_COLUMNS = app.config.get('DISPLAY_COLUMNS', 32)
+MESSAGE_MAX_LINES = app.config.get('MESSAGE_MAX_LINES', 10)
+
+db = QuartDB(app, url=app.config.get('DATABASE_URL', 'sqlite:///db.sqlite3'), )
 
 
 @app.before_request
@@ -29,13 +45,109 @@ async def ensure_session_id():
 
 @app.route('/', methods=['GET', 'POST'])
 async def index():
-    return await render_template('index.html')
+    if session.get('consent'):
+        return redirect(url_for('post'))
+
+    elif (await request.form).get('csrf_token') == session.get('csrf_token', -1):
+        session['consent'] = True
+        return redirect(url_for('post'))
+
+    else:
+        tok = session['csrf_token'] = secrets.token_urlsafe()
+        return await render_template('index.html', csrf_token=tok)
 
 
 @app.route('/post', methods=['GET', 'POST'])
 async def post():
-        if session.get('consent', False):
-            return await fun(*args, **kwargs)
+    if not session.get('consent'):
+        return redirect(url_for('index'))
+
+    result = await g.connection.fetch_one(
+            'SELECT COUNT(*) AS count FROM messages WHERE timestamp_displayed IS NULL AND suppress_display = 0')
+    digest = hashlib.sha3_256(b'eightserve_queue_length_random')
+    digest.update(request.remote_addr.encode())
+    digest.update(app.config['SECRET_KEY'])
+    digest.update(str(result['count']).encode())
+    digest.update(datetime.datetime.now().strftime('%y%m%d%H%M%S').encode())
+    digest = digest.digest()
+    count = round(max(5, (result['count'] * (1 + (digest[23]/255 - 0.5) * 0.1)) + (digest[42//2]%16 - 8))/5) * 5
+
+    if request.method == 'POST':
+        data = await request.form
+        message = data.get('message', '')
+        sub = re.sub("[^a-zA-Z0-9\',._:<(\[\])>!?^]", "", message).strip()
+        
+        if data.get('csrf_token') != session.get('csrf_token', -1):
+            await flash('Incorrect CSRF token.')
+
+        elif not re.sub('[^a-zA-Z0-9\',._:<(\[\])>!?^]', '', message).strip():
+            await flash('Message does not contain any displayable characters.')
+
+        elif any(len(line.strip()) > DISPLAY_COLUMNS*2 for line in message.splitlines()):
+            await flash('Message has one or more lines that are too long.')
+
+        elif len(message.splitlines()) > MESSAGE_MAX_LINES:
+            await flash('Message has too many lines.')
 
         else:
-            return redirect(url_for('/'))
+
+            result = await g.connection.fetch_one(
+                    'SELECT COUNT(*) AS count FROM shitlist WHERE remote_ip = :ip', {'ip': request.remote_addr})
+            on_shitlist = result['count'] > 0
+
+            result = await g.connection.fetch_one(
+                    'SELECT COUNT(*) AS count FROM suslist WHERE remote_ip = :ip AND timestamp_added > datetime("now", :timeout)',
+                    {'ip': request.remote_addr, 'timeout': '-' + app.config.get('SUSLIST_TIMEOUT', '01:00')})
+            on_suslist = result['count'] > app.config.get('SUSLIST_THRESHOLD', 5)
+
+            badwords = {row['word'] for row in await g.connection.fetch_all('SELECT word FROM badwords')}
+            words = [re.sub(r'[^a-zA-Z]', '', word).lower().strip() for word in message.split()]
+            has_badwords = any(word in badwords for word in words if word)
+
+            if on_shitlist:
+                suppress = True
+                moderated = False
+
+            elif on_suslist or has_badwords:
+                moderated = True
+                suppress = True
+                await g.connection.execute('INSERT INTO suslist (remote_ip, reason) VALUES (:ip, :reason)',
+                                           {'ip': request.remote_addr, 'reason': 'suslist' if on_suslist else 'badwords'})
+
+            else:
+                moderated = False
+                suppress = False
+
+            flags = []
+            if on_suslist:
+                flags.append('suslist')
+            if on_shitlist:
+                flags.append('shitlist')
+            if moderated:
+                flags.append('moderated')
+            if suppress:
+                flags.append('suppress')
+
+            flags = f' ({", ".join(flags)})' if flags else ''
+            print(f'Message submitted to queue(n={result["count"]}){flags}: {message!r}')
+            await g.connection.execute(
+                    '''INSERT INTO messages (message, suppress_display, moderated, remote_ip)
+                       VALUES (:message, :suppress_display, :moderated, :remote_ip)''', dict(
+                        message=message,
+                        suppress_display=suppress,
+                        moderated=moderated,
+                        remote_ip=request.remote_addr))
+
+            await flash('Message submitted.')
+            message = ''
+
+        tok = session['csrf_token'] = secrets.token_urlsafe()
+        return await render_template('post.html', cols=DISPLAY_COLUMNS, rows=MESSAGE_MAX_LINES, message=message, count=count, csrf_token=tok)
+
+    else:
+        tok = session['csrf_token'] = secrets.token_urlsafe()
+        return await render_template('post.html', cols=DISPLAY_COLUMNS, rows=MESSAGE_MAX_LINES, message='', count=count, csrf_token=tok)
+
+if __name__ == '__main__':
+    app.run(debug=True)
+

migrations/0.py

@@ -0,0 +1,34 @@
+
+async def migrate(conn):
+    await conn.execute('''CREATE TABLE IF NOT EXISTS messages (
+                    message TEXT,
+                    suppress_display INTEGER, 
+                    moderated INTEGER, 
+                    remote_ip TEXT,
+                    timestamp_received TEXT DEFAULT (datetime('now')),
+                    timestamp_displayed TEXT DEFAULT NULL
+                 )''')
+
+    await conn.execute('''CREATE TABLE IF NOT EXISTS shitlist (
+                    remote_ip TEXT,
+                    reason TEXT,
+                    timestamp_added TEXT DEFAULT (datetime('now'))
+                 )''')
+
+    await conn.execute('''CREATE TABLE IF NOT EXISTS suslist (
+                    remote_ip TEXT,
+                    reason TEXT,
+                    timestamp_added TEXT DEFAULT (datetime('now'))
+                 )''')
+
+    await conn.execute('''CREATE TABLE IF NOT EXISTS badwords (
+                    word TEXT,
+                    reason TEXT,
+                    timestamp_added TEXT DEFAULT (datetime('now'))
+                 )''')
+
+    await conn.execute('''INSERT INTO badwords (word, reason) VALUES ("bitcoin", "cryptocurrency")''')
+
+
+async def valid_migration(conn):
+    return True

templates/index.html

@@ -1,5 +1,8 @@
-<html>
+<!DOCTYPE html>
+<html lang="en">
     <head>
+        <title>8seg Web Interface</title>
+        <meta name="viewport" content="width=device-width, initial-scale=1.0">
     </head>
     <body>
         <h1>8seg Web Interface</h1>
@@ -7,10 +10,14 @@
         offensive messages, spam or similar. 8seg is currently open to the congress network on the hope that y'all will
         behave civilly. Please don't make me put a login wall in front of this thing, alright? ;) </p>
 
-        <p> If you have any questions, or you see 8seg being used by someone for bad, please email me at
+        <p>Please do not post automated messages at a frequency higher than one per 20 minutes. No spam, no
+        commercial advertising and absolutely nothing cryptocurrency-related.</p>
+
+        <p> If you have any questions, or you see 8seg being used for something stupid or bad, please email me at
         <a href="mailto:37c3.m@jaseg.de">37c3.m@jaseg.de</a> </p>
 
-        <form action="POST">
+        <form method="POST">
+            <input type="hidden" name="csrf_token" value="{{csrf_token}}"/>
             <button type="submit">I agree to not be an asshole</button>
         </form>
     </body>

templates/post.html

@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        <title>8seg Web Interface</title>
+        <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    </head>
+    <body>
+        {% with messages = get_flashed_messages() %}
+            {% if messages %}
+                <ul class=flashes>
+                    {% for message in messages %}
+                        <li>{{ message }}</li>
+                    {% endfor %}
+                </ul>
+            {% endif %}
+        {% endwith %}
+
+        There are approximately {{count}} messages in queue.
+
+        <form id="message-form" method="POST">
+            <input type="hidden" name="csrf_token" value="{{csrf_token}}"/>
+            <textarea name="message" cols="{{cols}}" rows="{{rows}}" placeholder="Message up to {{cols}} characters per line, displayed line by line">{{message}}</textarea>
+            <button type="submit">Post</button>
+        </form>
+    </body>
+<style>